HD404324FS datasheet(83/103 Pages) RENESAS

83 / 103 page

HD404054 Series/HD404094 Series

Warnings

1. Always specify addresses $0000 to $1FFF when programming with a PROM programmer. If address

$2000 or higher is accessed, the PROM may not be programmed or verified correctly. Set all data in

unused addresses to $FF.

Note that the plastic-package version cannot be erased or reprogrammed.

2. Make sure that the PROM programmer, socket adapter, and LSI are aligned correctly (their pin 1

positions match), otherwise overcurrents may damage the LSI. Before starting programming, make

sure that the LSI is firmly fixed in the socket adapter and the socket adapter is firmly fixed onto the

programmer.

3. PROM programmers have two voltages (V

PP): 12.5 V and 21 V. Remember that ZTAT™ devices

require a V

PP of 12.5 V—the 21-V setting will damage them. 12.5 V is the Intel 27256 setting.

Programming and Verification

The built-in PROM of the MCU can be programmed at high speed without risk of voltage stress or damage

to data reliability.

Programming and verification modes are selected as listed in table 28.

Table 28

PROM Mode Selection

Mode

0–O7

Programming

Low

High

Data input

Verification

High

Low

Data output

Programming inhibited

High

High impedance

HD404324FS Datasheet(PDF) 83 Page - Renesas Technology Corp